CHIRP

The characters currently accepted for this radio are @ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890@. What other characters does it support? I don't have one to check myself.

TH-F6A valid characters- (dot matrix display) All valid characters on p.17 - http://www.kenwoodusa.com/UserFiles/File/UnitedStates/Communications/AMA/Manuals/TH-F6.pdf
A-Z[]^_`a-z{|}~\ !"#$%&'()*+,-./0-9:;<=>?@

yaesu vx5 - (dot matrix display) - No valid character chart in VX5 manual - many greek symbols be seen here in the "font symbol chart lower down - http://www.idlcoyote.com/ps_tips/greeksym.html )
a-z{|}~!!(double !!)(divide symb)(x with underbar symb)(plus or minus symb)(square root symb)(pi symb)(sum symb)(alpha symb)(alpha symb)(beta symb)(micro symb)(1 superscript)(2 superscript)(3 superscript)(1/4 fraction symb)(1/2 fraction symb)(infiniti symb)(integration symb)(epsilon symb)(omega symb)(note symb)(double note symb)(bell symb)(low rectangle symb)(medium rectangle symb)(full rectangle symb)(similar to an asterisk symb)(<< symb)(>> symb)(cross symb)(many japanese symb)...(full triangle pointing right symb)(full triangle pointing left symb)(double initial quotes)"(double small triangles pointing up symb)(double small triangles pointing down symb)(circle symb)(return/enter arrow pointing left symb)(arrow pointing up symb)(arrow pointing down symb)(arrow pointing right symb)(arrow pointing left symb)(smaller top justified < char)(smaller top justified > char)(full triangle pointing up symb)(full triangle pointing down symb) (space)!"#$%&'()*+,-./0-9:;<=>?@A-Z[(yen symb)]^_`

Icom IC80AD valid characters - (14-segment LCD display) - All characters p.68 and p.97 of manual : http://www.icomamerica.com/en/downloads/DownloadDetails.aspx?Document=452
(some character representations are pretty poor!!)
A-Z0-9(various funky variations of a simple 14-segment lcd characters)*+-/|\@{](bottom justified ")_